Space-time is four-dimensional

Details Space-time is four-dimensional Space-time is four-dimensional

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gregr..17.1217c&link_type=abstract

General Relativity and Gravitation (ISSN 0001-7701), vol. 17, Dec. 1985, p. 1217-1222.

Computer Science

5

Cosmology, Gravitation Theory, Instantons, Quantum Theory, Space-Time Functions, Unified Field Theory, Dimensions

Scientific paper

The quantum state of the universe is described by Hartlee and Hawking's ground state which is defined by a path integral over all compact metrics. The most probable classical evolution of the universe can be considered to come from some gravitational instanton by a quantum tunneling. These arguments have been generalized to the case of Kaluza-Klein models. It is found that in d = 11 simple supergravity, with a minisuperspace ansatz, all instantons must have a four dimensional sector. It suggests that this is the main reason why space-time is four-dimensional.

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